1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
SET @start_global_value = @@global.innodb_background_scrub_data_interval;
#
# exists as global only
#
select @@global.innodb_background_scrub_data_interval;
@@global.innodb_background_scrub_data_interval
0
select @@session.innodb_background_scrub_data_interval;
ERROR HY000: Variable 'innodb_background_scrub_data_interval' is a GLOBAL variable
show global variables like 'innodb_background_scrub_data_interval';
Variable_name Value
innodb_background_scrub_data_interval 0
show session variables like 'innodb_background_scrub_data_interval';
Variable_name Value
innodb_background_scrub_data_interval 0
select * from information_schema.global_variables
where variable_name='innodb_background_scrub_data_interval';
VARIABLE_NAME VARIABLE_VALUE
INNODB_BACKGROUND_SCRUB_DATA_INTERVAL 0
select * from information_schema.session_variables
where variable_name='innodb_background_scrub_data_interval';
VARIABLE_NAME VARIABLE_VALUE
INNODB_BACKGROUND_SCRUB_DATA_INTERVAL 0
#
# show that it's writable
#
set global innodb_background_scrub_data_interval=100;
Warnings:
Warning 138 The parameter innodb_background_scrub_data_interval is deprecated and has no effect.
select @@global.innodb_background_scrub_data_interval;
@@global.innodb_background_scrub_data_interval
0
set global innodb_background_scrub_data_interval=200;
Warnings:
Warning 138 The parameter innodb_background_scrub_data_interval is deprecated and has no effect.
select @@global.innodb_background_scrub_data_interval;
@@global.innodb_background_scrub_data_interval
0
set global innodb_background_scrub_data_interval=300;
Warnings:
Warning 138 The parameter innodb_background_scrub_data_interval is deprecated and has no effect.
select @@global.innodb_background_scrub_data_interval;
@@global.innodb_background_scrub_data_interval
0
set session innodb_background_scrub_data_interval=400;
ERROR HY000: Variable 'innodb_background_scrub_data_interval' is a GLOBAL variable and should be set with SET GLOBAL
#
# incorrect types
#
set global innodb_background_scrub_data_interval=1.1;
ERROR 42000: Incorrect argument type to variable 'innodb_background_scrub_data_interval'
set global innodb_background_scrub_data_interval=1e1;
ERROR 42000: Incorrect argument type to variable 'innodb_background_scrub_data_interval'
set global innodb_background_scrub_data_interval="foo";
ERROR 42000: Incorrect argument type to variable 'innodb_background_scrub_data_interval'
SET @@global.innodb_background_scrub_data_interval = @start_global_value;
Warnings:
Warning 138 The parameter innodb_background_scrub_data_interval is deprecated and has no effect.
|
